A session of Zumba, a cardio-dance routine, can feel like a trip to the nightclub of a cruise ship, where a well-toned crew member teaches you to wiggle your hips and do the fast footwork for a mix of dance styles to the thump of loud music. While Zumba crowds are not plied with alcohol, people often throw away inhibitions — they pump their arms, applaud, let out “yeahs” — as they work out.

- The New York